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https://www.nps.gov/yose/planyourvisit/hours.htm
Yosemite National Park is open 24 hours per day, 365 days per year. However, the Hetch Hetchy Entrance Station is open only during daylight hours (approximately) and some roads are closed due to snow from around November through May or June.
https://www.allyosemite.com/park_info/hours_seasons.php
Yosemite National Park is open all year, 24 hours a day. You don't need reservations to visit the park, but you should make reservations for lodging and campgrounds well in advance. Park Entrance: Only one entrance is only open during daytime hours, which is the Hetch Hetchy Entrance Station.
https://www.nps.gov/yose/planyourvisit/reservations.htm
Based on local, state, and federal public health guidelines, the number of vehicles entering Yosemite was reduced from normal visitation levels for public safety from June 11, 2020 through October 31, 2020 and February 8, 2021 through February 28, 2021, and May 21, 2021 through September 30, 2021.
https://www.tripadvisor.com/ShowTopic-g61000-i315-k6854613-What_to_see_in_6_hours-Yosemite_National_Park_California.html
I will be driving from SF and expect to be at Yosemite around 10.30-11am and will have to leave the park around 5pm. Some of you have already recommended a couple of things... Yosemite National Park
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